Creating rust dependencies tree view

editors/code/package.json

@@ -285,6 +285,14 @@
                 "title": "Clear flycheck diagnostics",
                 "category": "rust-analyzer"
             },
+            {
+                "command": "rust-analyzer.revealDependency",
+                "title": "Reveal File"
+            },
+            {
+                "command": "rust-analyzer.openFile",
+                "title": "Open File"
+            },
             {
                 "command": "rust-analyzer.revealDependency",
                 "title": "Reveal File"

editors/code/src/commands.ts

@@ -8,7 +8,7 @@ import { applySnippetWorkspaceEdit, applySnippetTextEdits } from "./snippets";
 import { spawnSync } from "child_process";
 import { RunnableQuickPick, selectRunnable, createTask, createArgs } from "./run";
 import { AstInspector } from "./ast_inspector";
-import { isRustDocument, isCargoTomlDocument, sleep, isRustEditor, RustEditor } from "./util";
+import { isRustDocument, isCargoTomlDocument, sleep, isRustEditor, RustEditor } from './util';
 import { startDebugSession, makeDebugConfig } from "./debug";
 import { LanguageClient } from "vscode-languageclient/node";
 import { LINKED_COMMANDS } from "./client";

editors/code/src/ctx.ts

@@ -3,8 +3,8 @@ import * as lc from "vscode-languageclient/node";
 import * as ra from "./lsp_ext";
 import * as path from "path";
 
-import {Config, prepareVSCodeConfig} from "./config";
-import {createClient} from "./client";
+import {Config, prepareVSCodeConfig} from './config';
+import {createClient} from './client';
 import {
     executeDiscoverProject,
     isRustDocument,
@@ -12,8 +12,10 @@ import {
     LazyOutputChannel,
     log,
     RustEditor,
-} from "./util";
-import {ServerStatusParams} from "./lsp_ext";
+} from './util';
+import {ServerStatusParams} from './lsp_ext';
+import { Dependency, DependencyFile, RustDependenciesProvider, DependencyId } from './dependencies_provider';
+import { execRevealDependency } from './commands';
 import {
     Dependency,
     DependencyFile,

editors/code/src/toolchain.ts

@@ -98,6 +98,43 @@ export class Cargo {
         return artifacts[0].fileName;
     }
 
+    async crates(): Promise<Crate[]> {
+        const pathToCargo = await cargoPath();
+        return await new Promise((resolve, reject) => {
+            const crates: Crate[] = [];
+
+            const cargo = cp.spawn(pathToCargo, ['tree', '--prefix', 'none'], {
+                stdio: ['ignore', 'pipe', 'pipe'],
+                cwd: this.rootFolder
+            });
+            const rl = readline.createInterface({ input: cargo.stdout });
+            rl.on('line', line => {
+                const match = line.match(TREE_LINE_PATTERN);
+                if (match) {
+                    const name = match[1];
+                    const version = match[2];
+                    const extraInfo = match[3];
+                    // ignore duplicates '(*)' and path dependencies
+                    if (this.shouldIgnore(extraInfo)) {
+                        return;
+                    }
+                    crates.push({ name, version });
+                }
+            });
+            cargo.on('exit', (exitCode, _) => {
+                if (exitCode === 0)
+                    resolve(crates);
+                else
+                    reject(new Error(`exit code: ${exitCode}.`));
+            });
+
+        });
+    }
+
+    private shouldIgnore(extraInfo: string): boolean {
+        return extraInfo !== undefined && (extraInfo === '*' || path.isAbsolute(extraInfo));
+    }
+
     private async runCargo(
         cargoArgs: string[],
         onStdoutJson: (obj: any) => void,
@@ -129,6 +166,58 @@ export class Cargo {
     }
 }
 
+export async function activeToolchain(): Promise<string> {
+    const pathToRustup = await rustupPath();
+    return await new Promise((resolve, reject) => {
+        const execution = cp.spawn(pathToRustup, ['show', 'active-toolchain'], {
+            stdio: ['ignore', 'pipe', 'pipe'],
+            cwd: os.homedir()
+        });
+        const rl = readline.createInterface({ input: execution.stdout });
+
+        let currToolchain: string | undefined = undefined;
+        rl.on('line', line => {
+            const match = line.match(TOOLCHAIN_PATTERN);
+            if (match) {
+                currToolchain = match[1];
+            }
+        });
+        execution.on('exit', (exitCode, _) => {
+            if (exitCode === 0 && currToolchain)
+                resolve(currToolchain);
+            else
+                reject(new Error(`exit code: ${exitCode}.`));
+        });
+
+    });
+}
+
+export async function rustVersion(): Promise<string> {
+    const pathToRustup = await rustupPath();
+    return await new Promise((resolve, reject) => {
+        const execution = cp.spawn(pathToRustup, ['show', 'active-toolchain'], {
+            stdio: ['ignore', 'pipe', 'pipe'],
+            cwd: os.homedir()
+        });
+        const rl = readline.createInterface({ input: execution.stdout });
+
+        let currToolchain: string | undefined = undefined;
+        rl.on('line', line => {
+            const match = line.match(TOOLCHAIN_PATTERN);
+            if (match) {
+                currToolchain = match[1];
+            }
+        });
+        execution.on('exit', (exitCode, _) => {
+            if (exitCode === 1 && currToolchain)
+                resolve(currToolchain);
+            else
+                reject(new Error(`exit code: ${exitCode}.`));
+        });
+
+    });
+}
+
 /** Mirrors `project_model::sysroot::discover_sysroot_dir()` implementation*/
 export async function getSysroot(dir: string): Promise<string> {
     const rustcPath = await getPathForExecutable("rustc");
@@ -147,6 +236,16 @@ export async function getRustcId(dir: string): Promise<string> {
     return rx.exec(data)![1];
 }
 
+export async function getRustcVersion(dir: string): Promise<string> {
+    const rustcPath = await getPathForExecutable("rustc");
+
+    // do not memoize the result because the toolchain may change between runs
+    const data = await execute(`${rustcPath} -V`, { cwd: dir });
+    const rx = /(\d\.\d+\.\d+)/;
+
+    return rx.exec(data)![1];
+}
+
 /** Mirrors `toolchain::cargo()` implementation */
 export function cargoPath(): Promise<string> {
     return getPathForExecutable("cargo");